/*
 * Copyright (c) 2004-2025, University of Oslo
 * All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors 
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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package org.hisp.dhis.analytics.event.data.programindicator.ctefactory;

import java.util.Date;
import java.util.List;
import java.util.Map;
import org.hisp.dhis.analytics.common.CteContext;
import org.hisp.dhis.dataelement.DataElementService;
import org.hisp.dhis.db.sql.SqlBuilder;
import org.hisp.dhis.program.ProgramIndicator;

public class CteSqlFactoryRegistry {
  private final List<CteSqlFactory> factories;

  public CteSqlFactoryRegistry(DataElementService dataElementService) {
    factories =
        List.of(
            new VariableCteFactory(),
            new FilterCteFactory(),
            new ProgramStageDataElementCteFactory(dataElementService),
            new D2FunctionCteFactory());
  }

  /** Fallback that performs no parsing and leaves the SQL untouched. */
  private static final CteSqlFactory NOOP_FACTORY =
      new CteSqlFactory() {
        @Override
        public boolean supports(String rawSql) {
          return false;
        }

        @Override
        public String process(
            String rawSql,
            ProgramIndicator pi,
            Date start,
            Date end,
            CteContext ctx,
            Map<String, String> aliasMap,
            SqlBuilder qb) {
          // keep incoming SQL, do not touch context or alias map
          return rawSql;
        }
      };

  public CteSqlFactory factoryFor(String rawSql) {
    return factories.stream().filter(f -> f.supports(rawSql)).findFirst().orElse(NOOP_FACTORY);
  }
}
